Brake



Spt. '25, 1928. 1,685,429

A. F. MASURY BRAKE Filed June 10 1924 2 Sheets-Sheet 1 I if gnvento; I

Se ti25, 1928. 1,685,429

- A. F. MASURY BRAKE Filed Jun? 10, 1924 v 2 Sheets-Sheet 2 Snvmdtoz 5% W @fldh -M Patented Sept. 25, 1928.

UNITED STATES PATENT OFFICE.

conrrlmx, or new YORK, N. Y.,

A CORPORATION OF DELAWARE.

BRAKE.

Application filed June 10,

This invention relates to front axle construction particularly adapted for motor vehicles and has for its principal object the provision of an improved construction wherein the axle is carried upon a disc wheel through the instrumentality of a particularly compact unitary steering knuckle and knuckle pin and associated bearings and having brake mechanism so associated therewith as to permit the entire structure to be housed within a brake drum carried with the wheel in a manner to permit maximum turning of the wheel in steering. Accordingly a wheel spindle struck outfrom a disc wheel is adapted to turn within a steering knuckle which supports a knuckle pin passing therethrough and formed with an aperture through which the wheel spindle extends, a thrust bearing being supported at the upper end of the knuckle pin to carry the weight of the axle and its load. Upon the upper extremity of the knuckle pin is mounted an anchor for brake shoes adapted to be moved into friction al engagement with a brake drum carried with the wheel by means of cam actuated toggles supported uponthe lower extremity of the knuckle pin. The foregoing combination of elements provides a particularly compact construction which may be contained wholly within the brake drum and may be protected from foreign matter by a dust cap or the like closing the open inner side of the drum and supported upon the brake shoe anchor.

Other objects of the invention will be apparent from the following detailed description of the accompanying drawings illustrating a preferred embodiment and in which:

Figure 1 is a fragmentary view partly in section showing so much of :1V Wheel and axle of a motor vehicle looking from the rear as is necessary to illustrate the application of the invention thereto.

Figure 2 is a view showing the disposition of the steering knuckle and brake actuating mechanism within a brake drum.

The bifurcated end of the front axle of a motor vehicle is indicated at a in Figure l and is adapted to be supported upon a Wheel indicated in general at b by means of the knuckle and knuckle pin construction forming one aspect of the present invention. The upper arm a and the lower arm a of the front axle are apertured as at a a, respectively, to receive a knuckle pin 0, suitable bushings a, a being disposed inthe apertures 1924. Serial No. 719,225.

a a, respectively to serve as bearings for the knuckle pin rotating therein. The main portion of the knuckle pin is hollow as at c in order that the Weight thereof may be re duced and cylindrical bearing surfaces 0 c are formed thereon to engage the bushings a a", respectively. Centrally of the main portion of the knuckle pin is an aperture 0 through which is adapted to pass the wheel spindle b which is formed integrally with. the disc 6 of the wheel. Knuckle pinv c is supported upon knuckle (Z through the bevel bearingsurfaces d. The knuckle is likewise provided with an aperture (1 corresponding to the aperture of for the passage of wheel spindle Z) and the knuckle is supported upon the spindle by any usual bearings which are illustrated in Figure 1 as roller bearings e, a both of which are disposed within the knuckle and the bearing 6 being adjustable for wear by the lock washer e and lock nut 0 a suitable dust cap (Z being secured to the inner end of the knuckle to protect the bearings from. foreign matter. From the foregoing description it will be apparent that upon rotation of the wheel the wheel spindle b which is carried as a unit therewith turns within a knuckle and knuckle pin structure which turns, in steering, as a unit within the bushings a, a. The upper arm a is formed with an extension at and within this extension is disposed a thrust bearing f which rests upon a top edge 0" of the knuckle pin and serves to support the axle through the thrust bearing'adjusting nut f threaded into the extension a It will thus be apparent that the load carried by theaxle will be supported upon the unitary knuckle and knuckle pin through the thrust bearing f and which load in turn will be supported upon the wheel spindle I) through the bearings e,

Insteering, as has been pointed out bee fore, the knuckle d andknuckle pin a turn as a unit due to the faee'that the weight of the axle and its load maintains the knuckle 10o pin solid upon the tapered seat (1. The means for effecting steering of the wheel include bosses d, d disposed upon the forward and rear sides of knuckle (1, respectively, the

boss d receiving the steering drag link lever 10 h which is secured as by a bolt it to a cylin drical' extension 0 of the knuckle pin whereby the brake anchor and its associated parts may rotate in the same vertical plane as the wheel and the knuckle and knuckle pin structure. To the lower face of the arm a and immediately below the knuckle pin is secured a bearing; if, as by screws 71., a suitable clearance 7L7 being provided for the end of the knuckle pin and bushing a therefore in case -.of wear. A. bushing/i is disposed in an aperture it within bearing k for the reception of the earn shaft 15, 9 which is journaled in suitable'manner upon the arm a of the axle as at a and is adapted to be rotated by the lever arm it. A cam 71, is formed upon the rock shaft it for positioning inwardly of the bearing 7L and the outer end of the rock shaft is formed to receive a cam 72, secured in place by a nut h threaded over the end of the shaft. The lower end of the hearing if is formed as a cylindrical spindle it upon which is adapted to slide a slide 72/ secured as by links 71 to the ends of the respective brake shoes and formed with bearing surfaces 71. against which the cams bear. Upon move ment of lever h by means of a rod or the like secured to the bifurcated end thereof the cam shaft 71, will be revolved about its own axis to cause the cams it, h to bear against the surface it and by a sort of toggle connection through the link 72. to apply braking power to the brake drum k. Upon opposite movement of the arm it which will cause the cams to rotate out of engagement with the slide it the springs it, 71 will serve to draw the shoes away from the brake drum and elevate the slide therewith.

In order to protect the interior of the brake drum from foreign matter a circular shield i of a diameter substantially that of the interior of the brake drum is adapted to be secured by the bolt it to the brake anchor 72, and is provided diametrically opposite there to by an aperture 5 for the passage of the cam wee s-so shaft h which also serves to maintain the shield in position. Upon eitherside of the "disc member 6% bent at its upper end to form a bearing surface 6 for the-rim b of the wheel. Any convenient means such asthe rings j, j and ring y' may be provided .to secure the tire k demountably upon the rim, a suitable aperture 7) and offset portion 72 being provided at any convenient place in the periphery of the rim for the reception ofa valve tube is of an inner inflatable-tube k when pneumatic tubes are intended to be used upon the wheel. I

It will thus be seen that a particularly compact structure has been provided which has the requisite strength, is simple in its construction and easy of assembly and disassembly and which permits the association of steering and brake mechanism'withgthe front wheel of a Vehicle in a manner to take up little room while at the same time being readily accessible.

Various changes in the construction and disposition; of the elements described here inbefore will occur to those skilled in the art and are to be deemed within the scope. of the present invention, no limitation being intended except as indicated in the appended claim.

What I claim is:

In a wheelihaving a spindle formed intogrally with the wheel disc and a'brake for the wheel, a knuckle for the spindle a knuckle pin rigidly secured to said knuckle and carried with an axle to permit turning of the 7 wheel, brake shoes, an extension on the upper end of the knuckle pin for anchoring the brake shoes to the knuckle'pin, abearing, a mount therefor on the axle below the m uckle pin, said mount closing the bottom. of the knuckle pin aperture, as well as housing the bearing, and means mounted on said bearing and on the axle to apply said'bralre shoes.

This specification signed this 6 day of June, A.

ALFEED l MASURY. 

